EVIDENCE OF COUPLING BETWEEN TOROIDAL ALFVEN EIGENMODES AND KINETIC ALFVEN WAVES

A 60 GHz microwave scattering system was used to search for kinetic Al fven waves when toroidal Alfven eigenmodes were excited by the energet ic hydrogen ions produced during ion cyclotron resonance heating in th e tokamak fusion test reactor (TFTR). Scattering signals from the expe cted location with the correct frequencies and wave wavelengths were o bserved. These data are presented as the first evidence for the coupli ng between toroidal Alfven eigenmodes and kinetic Alfven waves.